What do you use to measure ocean depth

Which of the following best describes the economy of africa?

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?